Clothes pole height positioning control system of clothes hanger and method thereof

Abstract

The invention discloses a clothes pole height positioning control system of a clothes hanger and a method of the clothes pole height positioning control system. The device comprises a servo motor, an inner cavity of the servo motor is electrically connected with a control circuit board through a wire harness, the output end of the servo motor is in meshed connection with a threaded rod through teeth, the surface of the threaded rod is movably sleeved with a clothes hanger through threads, and a sensing mechanism and a voice control mechanism are arranged in the control circuit board. Through the arrangement of the induction mechanism, the remote controller can press the execution button and emit an infrared signal through the infrared emitter, the infrared signal emitted by the infrared emitter is received by the infrared receiver and transmitted to the control circuit board, and the control circuit board executes a command by receiving the signal to enable the servo motor to work. Finally, the servo motor works to drive the threaded rod to rotate, the threaded rod rotates to enable the clothes hanger to be screwed out or screwed in upwards or downwards in the forward and reverse rotation direction of the threaded rod, and the height position of the clothes hanger is controlled.

Description

Technical Field

[0001] This invention relates to the field of clothes rack technology, specifically to a clothes rack rod height positioning control system and method. Background Technology

[0002] An automatic clothes drying rack is a balcony home product that integrates many intelligent and automatic functions such as all-around three-dimensional drying technology, wireless radio frequency remote control, LED artistic lighting, and light wave intelligent sterilization. In the comparative case, publication number CN220132599U, this invention discloses a height control system for a clothes drying rack, including a main unit and a remote control. The main unit includes a housing and a motor. A circuit board is also installed inside the housing. The circuit board includes a signal receiving module, an upper limit recording module, a lower limit recording module, a motor control module, a coil 0-point positioning module, and a coil counting module. The coil 0-point positioning module is used to set a positioning point on the steel wire rope. The coil counting module is used to record the real-time coil turns. The number of coil turns can display the position of the clothes drying rack from the side. This invention solves the problem that the travel height of the clothes drying rack cannot be arbitrarily adjusted. First, an origin point is set on the steel wire rope of the clothes drying rack. Then, the position of the clothes drying rack is displayed by the number of coil turns through the coil counting module. Finally, the highest and lowest travel points of the clothes drying rack are recorded and the number of coil turns is limited to achieve control of the height of the clothes drying rack.

[0003] However, in implementing the relevant technology, the lifting height control system of the aforementioned clothes rack was found to have the following problems. The comparative case uses a combination of circuit boards, signal receiving modules, upper limit recording modules, limit recording modules and motor control modules to control the motor. The structure is complex and the signal execution efficiency is slow. Most existing clothes racks are semi-automatic and require manual triggering of buttons to execute commands. The manual operation process is too time-consuming and reduces the convenience of using the clothes rack.

[0004] Therefore, it is necessary to redesign and modify clothes racks to effectively prevent the problem that most clothes racks are semi-automatic and require manual triggering of buttons to execute commands, which leads to excessively long manual operation time. Summary of the Invention

[0005] To address the problems mentioned in the background art, the present invention aims to provide a clothes rack rod height positioning control system and method, which has the advantage of being easy to use and solves the problem that most clothes racks are semi-automatic and require manual triggering of buttons to execute commands, resulting in excessively long manual operation time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a clothes rack rod height positioning control system and method, comprising; Servo motor; The inner cavity of the servo motor is electrically connected to a control circuit board via a wire harness. The output end of the servo motor is connected to a threaded rod via tooth meshing. A clothes rack is movably sleeved on the surface of the threaded rod via a thread. The control circuit board has a built-in sensing mechanism and a voice control mechanism. The sensing mechanism includes an electromagnetic coil sensor, a rotation module, an upper limit circuit breaker, a lower limit circuit breaker, an infrared receiver, a remote controller, and an infrared transmitter. The control circuit board has a built-in electromagnetic coil sensor, which is connected to a servo motor signal. The control circuit board also has a built-in rotation module, which is connected to the upper limit circuit breaker and the lower limit circuit breaker via signals. The upper limit circuit breaker and the lower limit circuit breaker are installed inside the control circuit board. The control circuit board also has a built-in infrared receiver, which is connected to the remote controller via an infrared signal. The remote controller has a built-in infrared transmitter. The voice control mechanism includes a voice microphone, a network module, and a fuzzy word recognition module. The control circuit board has a built-in voice microphone and a built-in network module. The network module is connected to the fuzzy word recognition module via a network signal. Both the network module and the fuzzy word recognition module are connected to the voice microphone via signals.

[0007] In a preferred embodiment of the present invention, the electromagnetic coil sensor senses the number of rotations of the servo motor via a signal and records and uploads the data to the rotation count module, which in turn records the working status of the servo motor via the electromagnetic coil sensor.

[0008] In a preferred embodiment of the present invention, the number of revolutions module transmits the number of revolutions signal to the upper limit circuit breaker and the lower limit circuit breaker, and the upper limit circuit breaker and the lower limit circuit breaker distinguish their priority operation by the forward and reverse rotation of the servo motor.

[0009] In a preferred embodiment of the present invention, the infrared receiver is paired with the remote control via an infrared signal, and the remote control transmits an infrared signal via an infrared transmitter to enable the infrared receiver to work in the pairing configuration.

[0010] In a preferred embodiment of the present invention, the voice microphone is used to receive external voice words and record the executed commands by recognizing the meaning of words through a network module.

[0011] In a preferred embodiment of the present invention, the networking module uses network data to enable the fuzzy word recognition module to calibrate the meaning of words, and the fuzzy word recognition module uses network data to perform word matching calibration and execute commands.

[0012] In a preferred embodiment of the present invention, the output end of the servo motor is connected to the threaded rod via teeth, and the threaded rod achieves forward and reverse rotation through a helical thread and tooth transmission connection. The threaded rod is used in conjunction with the servo motor.

[0013] In a preferred embodiment of the present invention, a clothes rack is movably fitted onto the surface of the threaded rod via a thread, and the clothes rack is screwed in and out via a thread, and the clothes rack is used in conjunction with the threaded rod.

[0014] As a preferred embodiment of the present invention, it includes the following steps; S1; The user presses the execute button via remote control and emits an infrared signal through the infrared transmitter. The infrared signal is received by the infrared receiver and transmitted to the control circuit board. The control circuit board executes the command to make the servo motor work. The servo motor's operation causes the electromagnetic coil sensor to record the number of rotations and upload it to the rotation count module. The rotation count module prioritizes the upper and lower limit circuit breakers based on the forward and reverse rotation of the servo motor. In forward rotation, the lower limit circuit breaker works first, and when it reaches its limit value, it disconnects the execution signal, stopping the servo motor. Similarly, in reverse rotation, the upper limit circuit breaker works first, and when it reaches its limit value, it disconnects the execution signal, stopping the servo motor. Finally, the servo motor drives the threaded rod to rotate, causing the clothes rack to rotate up or down in the forward or reverse direction of the threaded rod, thus controlling the height of the clothes rack. The system is triggered directly by voice commands. The voice microphone recognizes spoken words and quickly matches or calibrates the command through a network module and a fuzzy word recognition module. The voice command is then uploaded to the control circuit board. The control circuit board receives the command and executes it to start the servo motor. The servo motor's operation causes the electromagnetic coil sensor to record the number of rotations and upload it to the rotation count module. The rotation count module prioritizes the upper and lower limit circuit breakers based on the forward and reverse rotation of the servo motor. In forward rotation, the lower limit circuit breaker operates first. When the lower limit circuit breaker reaches its limit value, the execution signal is released, stopping the servo motor from rotating. Similarly, in reverse rotation, the upper limit circuit breaker operates first. When the upper limit circuit breaker reaches its limit value, the execution signal is released, stopping the servo motor from rotating. Finally, the servo motor drives the threaded rod to rotate. The rotation of the threaded rod causes the clothes rack to rotate up or down in the forward or reverse direction of the threaded rod, thus controlling the height of the clothes rack.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the inclusion of a sensing mechanism, enables a remote control to activate an infrared transmitter by pressing an execution button. This transmitter emits an infrared signal, which is received by an infrared receiver and transmitted to a control circuit board. The control circuit board then executes a command to activate a servo motor. The servo motor's operation causes an electromagnetic coil sensor to record the number of rotations, which is then uploaded to a rotation count module. The rotation count module prioritizes the upper and lower limit circuit breakers based on the servo motor's forward and reverse rotation. In forward rotation, the lower limit circuit breaker operates first, and upon reaching its limit, it disconnects the execution signal, stopping the servo motor. Similarly, in reverse rotation, the upper limit circuit breaker operates first, and upon reaching its limit, it disconnects the execution signal, stopping the servo motor. Finally, the servo motor drives a threaded rod to rotate, causing the clothes rack to rotate upwards or downwards in either direction, thus controlling the height of the clothes rack.

[0016] This invention, through the establishment of a voice control mechanism, enables the voice microphone to recognize spoken words and quickly match or calibrate words through a network module and a fuzzy word recognition module. The voice command is then uploaded to the control circuit board, which receives and executes the command to start the servo motor. The servo motor's operation causes the electromagnetic coil sensor to record the number of rotations and upload this information to the rotation count module. The rotation count module prioritizes the upper and lower limit circuit breakers based on the forward and reverse rotation of the servo motor. In forward rotation, the lower limit circuit breaker operates first; reaching its limit value disconnects the execution signal, stopping the servo motor's rotation. Similarly, in reverse rotation, the upper limit circuit breaker operates first; reaching its limit value disconnects the execution signal, stopping the servo motor's rotation. Finally, the servo motor drives the threaded rod to rotate, causing the clothes rack to rotate upwards or downwards in the same direction, thus controlling the height of the clothes rack. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] In the diagram: 1. Servo motor; 2. Control circuit board; 3. Threaded rod; 4. Clothes rack; 5. Sensing mechanism; 51. Electromagnetic coil sensor; 52. Turns module; 53. Upper limit circuit breaker; 54. Lower limit circuit breaker; 55. Infrared receiver; 56. Remote control; 57. Infrared transmitter; 6. Voice control mechanism; 61. Voice microphone; 62. Networking module; 63. Fuzzy word recognition module. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figure 1 As shown, the present invention provides a clothes rack rod height positioning control system and method, comprising: Servo motor 1; The inner cavity of the servo motor 1 is electrically connected to the control circuit board 2 via a wire harness. The output end of the servo motor 1 is connected to the threaded rod 3 via tooth meshing. The surface of the threaded rod 3 is fitted with a clothes rack 4 via a threaded sleeve. The control circuit board 2 has a built-in sensing mechanism 5 and a voice control mechanism 6. The sensing mechanism 5 includes an electromagnetic coil sensor 51, a rotation module 52, an upper limit circuit breaker 53, a lower limit circuit breaker 54, an infrared receiver 55, a remote controller 56, and an infrared transmitter 57. The control circuit board 2 has an electromagnetic coil sensor 51 built in, which is connected to the servo motor 1 via a signal. The control circuit board 2 has a rotation module 52 built in, which is connected to the upper limit circuit breaker 53 and the lower limit circuit breaker 54 via signals. The upper limit circuit breaker 53 and the lower limit circuit breaker 54 are installed inside the control circuit board 2. The control circuit board 2 has an infrared receiver 55 built in, which is connected to the remote controller 56 via an infrared signal. The remote controller 56 has an infrared transmitter 57 built in. The voice control mechanism 6 includes a voice microphone 61, a network module 62, and a fuzzy word recognition module 63. The control circuit board 2 has a built-in voice microphone 61 and a built-in network module 62. The network module 62 is connected to the fuzzy word recognition module 63 via a network signal. Both the network module 62 and the fuzzy word recognition module 63 are connected to the voice microphone 61 via signals.

[0021] refer to Figure 1 The electromagnetic coil sensor 51 senses the number of rotations of the servo motor 1 through a signal and records and uploads the data to the rotation count module 52. The rotation count module 52 records the working status of the servo motor 1 through the electromagnetic coil sensor 51.

[0022] As a technical optimization of the present invention, the electromagnetic coil sensor 51 can assist the servo motor 1 in working and at the same time record the number of rotations, thus avoiding the servo motor 1 from working for a long time without stopping.

[0023] refer to Figure 1The rotation module 52 transmits the rotation signal to the upper limit circuit breaker 53 and the lower limit circuit breaker 54. The upper limit circuit breaker 53 and the lower limit circuit breaker 54 are distinguished by the forward and reverse rotation of the servo motor 1 to determine their priority.

[0024] As a technical optimization of the present invention, the setting of the rotation count module 52 can assist the upper limit circuit breaker 53 and the lower limit circuit breaker 54 in their operation, and at the same time play the role of execution priority, so as to avoid mechanical damage caused by the rotation count module 52 recording the number of rotations exceeding the range of the upper limit circuit breaker 53 and the lower limit circuit breaker 54.

[0025] refer to Figure 1 The infrared receiver 55 is paired with the remote controller 56 via infrared signals, and the remote controller 56 transmits infrared signals through the infrared transmitter 57 to enable the infrared receiver 55 to work.

[0026] As a technical optimization of the present invention, by setting up the infrared receiver 55, the remote controller 56 can be assisted in working, thus avoiding the situation where the remote controller 56 cannot directly control the control circuit board 2 to work.

[0027] refer to Figure 1 The voice microphone 61 recognizes the meaning of words through the network module 62 to trigger the execution of commands. The voice microphone 61 is used to receive external voice words and record the executed commands.

[0028] As a technical optimization of the present invention, the voice microphone 61 can recognize external words and play the role of voice recognition, thus avoiding the inability to control the machine by voice when the words are unclear.

[0029] refer to Figure 1 The network module 62 uses network data to enable the fuzzy word recognition module 63 to calibrate word meanings. The fuzzy word recognition module 63 uses network data to obtain data, perform word matching calibration, and execute commands.

[0030] As a technical optimization of the present invention, the network module 62 can assist the fuzzy word recognition module 63 in its work, thus avoiding the inability to quickly recognize, calibrate, and execute commands due to fuzzy speech words.

[0031] refer to Figure 1 The output end of servo motor 1 is connected to threaded rod 3 via teeth. Threaded rod 3 achieves forward and reverse rotation through a helical thread and tooth transmission connection. Threaded rod 3 is used in conjunction with servo motor 1. As a technical optimization of the present invention, by setting the servo motor 1, it is possible to work with the threaded rod 3 through the teeth, thus avoiding the mechanical failure caused by the threaded rod 3 being unable to drive rotation.

[0032] refer to Figure 1 A clothes rack 4 is movably fitted onto the surface of the threaded rod 3 via a threaded connection. The clothes rack 4 is screwed in and out via the thread, and the clothes rack 4 is used in conjunction with the threaded rod 3. As a technical optimization of the present invention, the threaded rod 3 can assist the clothes rack 4 in working, and avoid the fact that the rotation of the threaded rod 3 cannot drive the clothes rack 4 to rotate up and down through the surface threads.

[0033] The working principle and usage process of this invention are as follows: During use, the user presses the execution button via remote control 56 and emits an infrared signal via infrared transmitter 57. The infrared signal emitted by infrared transmitter 57 is received by infrared receiver 55 and transmitted to control circuit board 2. Control circuit board 2 executes commands based on the received signals to make servo motor 1 work. The operation of servo motor 1 causes electromagnetic coil sensor 51 to record the number of rotations and upload it to the rotation count module 52. The rotation count module 52 prioritizes the operation of upper limit circuit breaker 53 and lower limit circuit breaker 54 based on the forward and reverse rotation of servo motor 1. In forward rotation, lower limit circuit breaker 54 operates first; when it reaches its limit value, the execution signal is disconnected, causing servo motor 1 to stop rotating. Similarly, in reverse rotation, upper limit circuit breaker 53 operates first; when it reaches its limit value, the execution signal is disconnected, causing servo motor 1 to stop rotating. Finally, the operation of servo motor 1 drives the threaded rod 3 to rotate. The rotation of threaded rod 3 causes clothes rack 4 to rotate upwards or downwards in the same direction as the forward or reverse rotation of threaded rod 3, thus controlling the clothes rack. The height position can also be triggered directly by voice commands. The voice microphone 61 recognizes voice words and quickly matches or calibrates the words through the network module 62 and the fuzzy word recognition module 63. Then, the voice command is uploaded to the control circuit board 2. The control circuit board 2 receives the command and executes it to start the servo motor 1. The operation of the servo motor 1 causes the electromagnetic coil sensor 51 to record the number of rotations and upload it to the rotation count module 52. The rotation count module 52 distinguishes the priority of the upper limit circuit breaker 53 and the lower limit circuit breaker 54 according to the forward and reverse rotation of the servo motor 1. When rotating forward, the lower limit circuit breaker 54 works first. When the lower limit circuit breaker 54 reaches its limit value, the execution signal is disconnected, and the servo motor 1 stops rotating. Similarly, when rotating in reverse, the upper limit circuit breaker 53 works first. When the upper limit circuit breaker 53 reaches its limit value, the execution signal is disconnected, and the servo motor 1 stops rotating. Finally, the operation of the servo motor 1 drives the threaded rod 3 to rotate. The rotation of the threaded rod 3 causes the clothes rack 4 to rotate upward or downward in the forward and reverse rotation direction of the threaded rod 3, thereby controlling the height position of the clothes rack 4.

[0034] In summary, the clothes rack height positioning control system and method, through the coordinated use of servo motor 1, control circuit board 2, threaded rod 3, clothes rack 4, sensing mechanism 5, electromagnetic coil sensor 51, coil counting module 52, upper limit circuit breaker 53, lower limit circuit breaker 54, infrared receiver 55, remote control 56, infrared transmitter 57, voice control mechanism 6, voice microphone 61, networking module 62, and fuzzy word recognition module 63, solves the problem that most existing clothes racks are semi-automatic and require manual button triggering to execute commands, resulting in excessively long manual operation time.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A clothes rack height positioning control, characterized in that, include: Servo motor (1); The inner cavity of the servo motor (1) is electrically connected to the control circuit board (2) through a wire harness. The output end of the servo motor (1) is connected to the threaded rod (3) through tooth meshing. The surface of the threaded rod (3) is fitted with a clothes rack (4) through a threaded sleeve. The control circuit board (2) has a built-in sensing mechanism (5) and a voice control mechanism (6). The sensing mechanism (5) includes an electromagnetic coil sensor (51), a rotation module (52), an upper limit circuit breaker (53), a lower limit circuit breaker (54), an infrared receiver (55), a remote controller (56), and an infrared transmitter (57). The control circuit board (2) has an electromagnetic coil sensor (51) built in, and the electromagnetic coil sensor (51) is connected to the servo motor (1) via a signal. The control circuit board (2) has a rotation module (52) built in, and the rotation module (52) is connected to the upper limit circuit breaker (53) and the lower limit circuit breaker (54) via signals. The upper limit circuit breaker (53) and the lower limit circuit breaker (54) are installed inside the control circuit board (2). The control circuit board (2) has an infrared receiver (55) built in, and the infrared receiver (55) is connected to the remote controller (56) via an infrared signal. The remote controller (56) has an infrared transmitter (57) built in. The voice control mechanism (6) includes a voice microphone (61), a network module (62) and a fuzzy word recognition module (63). The control circuit board (2) has a built-in voice microphone (61) and a built-in network module (62). The network module (62) is connected to the fuzzy word recognition module (63) via a network signal. Both the network module (62) and the fuzzy word recognition module (63) are connected to the voice microphone (61) via signals.

2. The clothes rack height positioning control according to claim 1, characterized in that: The electromagnetic coil sensor (51) senses the number of rotations of the servo motor (1) through a signal and records and uploads the data to the rotation module (52). The rotation module (52) records the working status of the servo motor (1) through the electromagnetic coil sensor (51).

3. The clothes rack height positioning control according to claim 1, characterized in that: The number of revolutions module (52) transmits the number of revolutions signal to the upper limit circuit breaker (53) and the lower limit circuit breaker (54). The upper limit circuit breaker (53) and the lower limit circuit breaker (54) are distinguished by the forward and reverse rotation of the servo motor (1) to determine the priority of the upper limit circuit breaker (53) and the lower limit circuit breaker (54).

4. The clothes rack height positioning control according to claim 1, characterized in that: The infrared receiver (55) is matched with the remote controller (56) via infrared signals. The remote controller (56) transmits infrared signals via infrared transmitter (57) to enable the infrared receiver (55) to work.

5. The clothes rack height positioning control according to claim 1, characterized in that: The voice microphone (61) identifies the meaning of words through the network module (62) to trigger the execution command. The voice microphone (61) is used to receive external voice words and record the execution command.

6. The clothes rack height positioning control according to claim 1, characterized in that: The network module (62) uses network data to calibrate the meaning of words in the fuzzy word recognition module (63). The fuzzy word recognition module (63) uses network data to perform word matching calibration and execute commands.

7. The clothes rack height positioning control according to claim 1, characterized in that: The output end of the servo motor (1) is connected to the threaded rod (3) through teeth. The threaded rod (3) achieves forward and reverse rotation through the oblique thread and tooth transmission connection. The threaded rod (3) is used in conjunction with the servo motor (1).

8. The clothes rack height positioning control according to claim 1, characterized in that: The surface of the threaded rod (3) is fitted with a clothes rack (4) by means of threads. The clothes rack (4) is screwed in and out by means of threads. The clothes rack (4) is used in conjunction with the threaded rod (3).

9. The clothes rack rod height positioning control system and method according to claim 1, characterized in that: Includes the following steps; S1; The user presses the execution button via remote control (56) and emits an infrared signal via infrared transmitter (57). The infrared signal emitted by infrared transmitter (57) is received by infrared receiver (55) and transmitted to control circuit board (2). Control circuit board (2) executes the command to make servo motor (1) work by receiving the signal. The work of servo motor (1) makes electromagnetic coil sensor (51) record the number of rotations and upload it to the rotation module (52). The rotation module (52) distinguishes between upper limit circuit breaker (53) and lower limit circuit breaker (54) according to the forward and reverse rotation of servo motor (1). 54) Priority operation: When the lower limit circuit breaker (54) is in forward rotation, it operates first. When the lower limit circuit breaker (54) reaches its limit value, the execution signal causes the servo motor (1) to stop rotating. Similarly, when the upper limit circuit breaker (53) is in reverse rotation, it operates first. When the upper limit circuit breaker (53) reaches its limit value, the execution signal causes the servo motor (1) to stop rotating. Finally, the servo motor (1) operates, driving the threaded rod (3) to rotate. The rotation of the threaded rod (3) causes the clothes rack (4) to rotate upwards or downwards in the forward or reverse direction of the threaded rod (3), thus controlling the height position of the clothes rack (4). It can be triggered directly by voice command. The voice microphone (61) recognizes the voice words and quickly matches or calibrates the words through the network module (62) and the fuzzy word recognition module (63). Then, the voice command is uploaded to the control circuit board (2). The control circuit board (2) receives the command and executes to start the servo motor (1). The operation of the servo motor (1) causes the electromagnetic coil sensor (51) to record the number of rotations and upload it to the rotation count module (52). The rotation count module (52) distinguishes between the upper limit circuit breaker (53) and the lower limit circuit breaker according to the forward and reverse rotation of the servo motor (1). (54) Priority operation, forward rotation of the lower limit circuit breaker (54) priority operation reaches the lower limit circuit breaker (54) limit value disconnection execution signal to make the servo motor (1) stop working and rotate. Similarly, reverse rotation of the upper limit circuit breaker (53) priority operation reaches the upper limit circuit breaker (53) limit value disconnection execution signal to make the servo motor (1) stop working and rotate. Finally, the servo motor (1) works to drive the threaded rod (3) to rotate. The rotation of the threaded rod (3) makes the clothes rack (4) rotate upward or downward in the forward and reverse rotation direction of the threaded rod (3) to realize the control of the height position of the clothes rack (4).

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